precipitant -- (an agent that causes a precipitate to form)
Overview of adj precipitant
The adj precipitant has 1 sense
hasty, overhasty, precipitate, precipitant, precipitous -- (done with very great haste and without due deliberation; "hasty marriage seldom proveth well"- Shakespeare; "hasty makeshifts take the place of planning"- Arthur Geddes; "rejected what was regarded as an overhasty plan for reconversion"; "wondered whether they had been rather precipitate in deposing the king")